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<div class="title">Nuvoton NuMicro M2351 </div>  </div>
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<div class="textblock"><p>This single processor demo application shows how to do the <a class="el" href="UseCases.html#UseCase_TrustZone">TrustZone Partitioning</a>. It is split into a secure and non-secure part. Some peripherals are assigned to either the secure or the non-secure zone to demonstrate the generation of PPC setup and interrupt configuration in the partition.h template. Using CMSIS-Zone, it generates:</p><ul>
<li>A header file that contains #defines to control the various linker scatter files (and might be used in other parts of the application).</li>
<li>Secure attribution unit (SAU) setup.</li>
</ul>
<p>The application itself shows how to implement calls between the secure and the non-secure part and how to use this to blink an LED.</p>
<h1><a class="anchor" id="zTEM2351_Eclipse"></a>
Using the CMSIS-Zone project</h1>
<ul>
<li><a class="el" href="zTExamples.html#zTExImport">Import</a> the project "Examples\M2351\Zone" into the CMSIS-Zone utility</li>
<li><a class="el" href="zTUI.html#zTProjEx">Open</a> the M2351.azone file</li>
<li><a class="el" href="zTUIGenerate.html">Generate</a> the related output files</li>
</ul>
<p>The M2351.azone file of that project has the following configuration settings:</p><ul>
<li><a class="el" href="zTUIZonePart.html#zTUICreate">Added the zones</a> <code>Secure</code> and <code>NonSecure</code> </li>
<li><a class="el" href="zTUIMemPerRes.html#zTUIMemAdd">Created the memory regions</a> <code>CODE_NS</code>, <code>CODE_S</code>, <code>Veneer</code>, <code>DATA_NS</code>, and <code>DATA_S</code> </li>
<li>Selected various memory regions and peripherals for using in the different zones: <div class="image">
<img src="m2351_zones.png" alt=""/>
</div>
</li>
</ul>
<p>The zones use different Flash and SRAM regions for code and data. To generate the output, click on the <a class="el" href="zTUIGenerate.html">Generate</a> button in the Zone Editor tool bar. This creates the following files in the <code>ftl_gen</code> directory:</p>
<table class="markdownTable">
<tr class="markdownTableHead">
<th class="markdownTableHeadLeft">Template File </th><th class="markdownTableHeadLeft">Generated File </th><th class="markdownTableHeadLeft">Description  </th></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyLeft">helper.ftlinc </td><td class="markdownTableBodyLeft">N/A </td><td class="markdownTableBodyLeft">Helper template file with FTL functions.  </td></tr>
<tr class="markdownTableRowEven">
<td class="markdownTableBodyLeft">mem_layout.h.ftl </td><td class="markdownTableBodyLeft">mem_layout.h </td><td class="markdownTableBodyLeft">Header file that contains the memory region definitions, for example for the linker scatter file.  </td></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyLeft">partition_gen.h.ftl </td><td class="markdownTableBodyLeft">partition_gen.h </td><td class="markdownTableBodyLeft">Configuration of the secure attribution unit (SAU) and the NVIC interrupt assignment.  </td></tr>
<tr class="markdownTableRowEven">
<td class="markdownTableBodyLeft">scatter_ns.sct.ftl </td><td class="markdownTableBodyLeft">scatter_ns.sct </td><td class="markdownTableBodyLeft">Example scatter file for the non-secure zone.  </td></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyLeft">scatter_s.sct.ftl </td><td class="markdownTableBodyLeft">scatter_s.sct </td><td class="markdownTableBodyLeft">Example scatter file for the secure zone.  </td></tr>
</table>
<p>These files can be used in any IDE to create the final application. In the following, the usage in Arm Keil MDK is described.</p>
<h1><a class="anchor" id="zTEM2351_MDK"></a>
Using the MDK project</h1>
<p>The example project can be loaded, built and debugged in µVision by performing the following steps:</p>
<ol type="1">
<li>Navigate to Examples/M2351/MDK</li>
<li>Open the multi-project workspace TrustZone.uvmpw</li>
<li>Optional: Update the generated files by executing the copy_gen.bat scripts in Secure\mdk and NonSecure\mdk folders.</li>
<li>Run the batch build in MDK. Both projects, Secure and NonSecure need to be compiled in order.</li>
<li>Set <code>Secure</code> as active project.</li>
<li>Connect the NuMaker-PFM-M2351 board using a Micro-USB cable at ICEJ.</li>
<li>Open <b>Options for Target - Debug</b> and make sure that the NULink Debugger is selected.</li>
<li>Launch a debug session and watch LEDG and LEDY blinking.</li>
</ol>
<h1><a class="anchor" id="zTEM2351_MDK_Setup"></a>
MDK project setup</h1>
<p>The multiproject workspace contains the <code>Secure</code> project and the <code>NonSecure</code> project:</p>
<div class="image">
<img src="m2351_proj_window.png" alt=""/>
</div>
<p>The projects use the files generated in CMSIS-Zone as follows:</p>
<table class="markdownTable">
<tr class="markdownTableHead">
<th class="markdownTableHeadLeft">File </th><th class="markdownTableHeadLeft">Used in </th><th class="markdownTableHeadLeft">Description  </th></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyLeft">mem_layout.h </td><td class="markdownTableBodyLeft">Secure, NonSecure </td><td class="markdownTableBodyLeft">Input for the scatter files.  </td></tr>
<tr class="markdownTableRowEven">
<td class="markdownTableBodyLeft">partition_gen.h </td><td class="markdownTableBodyLeft">Secure </td><td class="markdownTableBodyLeft">Configuration of the secure attribution unit (SAU) and the NVIC interrupt assignment.  </td></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyLeft">scatter_ns.sct </td><td class="markdownTableBodyLeft">NonSecure </td><td class="markdownTableBodyLeft">Scatter file for non-secure zone (initally based on generated file).  </td></tr>
<tr class="markdownTableRowEven">
<td class="markdownTableBodyLeft">scatter_s.sct </td><td class="markdownTableBodyLeft">Secure </td><td class="markdownTableBodyLeft">Scatter file for secure zone (initally based on generated file).  </td></tr>
</table>
<p>The scatter files <code>scatter_s.sct</code> and <code>scatter_ns.sct</code> are using a preinclude to mem_layout.h to get the information about the different memory regions.</p>
<dl class="section note"><dt>Note</dt><dd>If you want to learn more about the general project layout for an Armv8-M project using TrustZone, refer to <a href="https://www.keil.com/appnotes/docs/apnt_291.asp" target="_blank">Application Note 291</a>.</dd></dl>
<h2><a class="anchor" id="zTEM2351_hwsScatter"></a>
scatter_s.sct</h2>
<p>As explained previously, the #defines in <code>mem_layout.h</code> can be used to create generic scatter files that are easy to update once changes in the CMSIS-Zone project happen. Using the <b>mem_layout.h</b> file from CMSIS-Zone, the following scatter file is used in the <code>Sections</code> project:</p>
<div class="fragment"><div class="line"><span class="preprocessor">#! armclang -E --target=arm-arm-none-eabi -mcpu=cortex-m23 -I../ -xc</span></div>
<div class="line"> </div>
<div class="line"><span class="preprocessor">#include &quot;mem_layout.h&quot;</span></div>
<div class="line"> </div>
<div class="line">; *------- &lt;&lt;&lt; Use Configuration Wizard in Context Menu &gt;&gt;&gt; ------------------</div>
<div class="line"> </div>
<div class="line">;&lt;h&gt; Stack Configuration</div>
<div class="line">;  &lt;o&gt; Stack Size (in Bytes) &lt;0x0-0xFFFFFFFF:8&gt;</div>
<div class="line">;&lt;/h&gt;</div>
<div class="line"><span class="preprocessor">#define STACK_SIZE 0x400</span></div>
<div class="line"> </div>
<div class="line">;&lt;h&gt; Heap Configuration</div>
<div class="line">;  &lt;o&gt; Heap Size (in Bytes) &lt;0x0-0xFFFFFFFF:8&gt;</div>
<div class="line">;&lt;/h&gt;</div>
<div class="line"><span class="preprocessor">#define HEAP_SIZE 0xC00</span></div>
<div class="line"> </div>
<div class="line">; *-------------- &lt;&lt;&lt; end of configuration section &gt;&gt;&gt; -----------------------</div>
<div class="line">LR_CODE_S REGION_CODE_S_START REGION_CODE_S_SIZE {</div>
<div class="line">  ER_CODE_S REGION_CODE_S_START REGION_CODE_S_SIZE {</div>
<div class="line">          (RESET,+FIRST)</div>
<div class="line">      (InRoot$$Sections)</div>
<div class="line">    .ANY (+RO +XO)</div>
<div class="line">  }</div>
<div class="line">  RW_DATA_S REGION_DATA_S_START REGION_DATA_S_SIZE-HEAP_SIZE-STACK_SIZE {</div>
<div class="line">    .ANY (+RW +ZI)</div>
<div class="line">  }</div>
<div class="line"><span class="preprocessor">#if HEAP_SIZE&gt;0</span></div>
<div class="line">  ARM_LIB_HEAP REGION_DATA_S_START+REGION_DATA_S_SIZE-HEAP_SIZE-STACK_SIZE EMPTY HEAP_SIZE {</div>
<div class="line">  }</div>
<div class="line"><span class="preprocessor">#endif</span></div>
<div class="line"><span class="preprocessor">#if STACK_SIZE&gt;0</span></div>
<div class="line">  ARM_LIB_STACK REGION_DATA_S_START+REGION_DATA_S_SIZE-STACK_SIZE EMPTY STACK_SIZE {</div>
<div class="line">  }</div>
<div class="line"><span class="preprocessor">#endif  </span></div>
<div class="line">}</div>
<div class="line">LR_VENEER REGION_VENEER_START REGION_VENEER_SIZE {</div>
<div class="line">  ER_VENEER REGION_VENEER_START REGION_VENEER_SIZE {</div>
<div class="line">         *(Veneer$$CMSE)</div>
<div class="line">  }</div>
<div class="line">}</div>
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